2020 Mercedes-Benz S560 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2020 Mercedes-Benz S560 and How to Fix Them

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
0%
25% chance it's the
Control Module
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2020 Mercedes-Benz S560 cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty or malfunctioning sensor can lead to incorrect readings, causing issues with engine performance or other systems relying on accurate data.
  • Control Module: A faulty control module can lead to erratic vehicle behavior or failure of various electronic systems due to improper signal processing.
  • Throttle: A faulty throttle body or a defective accelerator pedal position sensor may be causing inconsistent throttle response.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2020 Mercedes-Benz S560 cruise control isn't working?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

In the event that a wheel speed sensor fails, the ABS, traction control system (TCS) and manufacturer specific stability control system lights will illuminate, informing the driver that the systems are disabled. The vehicle will be more prone to tire slip, and normal driving patterns may need to be adjusted to correct for the loss of computer control. On older vehicle's, the speedometer can be affected, causing illumination of the check engine light as well.

What are the initial diagnostic steps to troubleshoot the non-functional cruise control in a 2020 Mercedes-Benz S560?

When troubleshooting the non-functional cruise control in a 2020 Mercedes-Benz S560, it's essential to adopt a systematic diagnostic approach. Start by checking the cruise control fuse, as a blown or damaged fuse can easily disrupt the system's functionality. Next, verify that the cruise control settings on the dashboard are correctly configured, ensuring that nothing is inadvertently preventing activation. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues that may not be immediately visible. Additionally, inspect the cruise control buttons on the steering wheel for any signs of damage or malfunction, as these controls are critical for operation. A test drive is also beneficial; it allows you to see if the cruise control engages and to identify any irregularities during use. Finally, don't overlook the vehicle speed sensor, as its proper functioning is vital for the cruise control system to operate effectively. By following these steps, you can methodically diagnose and potentially resolve the cruise control issue in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2020 Mercedes-Benz S560?

When troubleshooting the cruise control system in a 2020 Mercedes-Benz S560, several common problems may be at play. One of the first areas to check is the speed sensor, as a faulty sensor can disrupt the system's ability to detect the vehicle's speed, preventing cruise control from engaging. Additionally, the brake light switch is crucial; if it malfunctions, it may cause the cruise control to disengage unexpectedly when the brake pedal is pressed, even if the driver hasn't turned it off. Another potential issue lies with the throttle actuator, which is responsible for maintaining speed; if it fails, the system may struggle to communicate effectively with the engine. Electrical problems, such as blown fuses or wiring issues, can also hinder cruise control functionality, so inspecting the vehicle's electrical system is essential. Lastly, software glitches in the onboard computer can interfere with cruise control operations, making it worthwhile to check for any available software updates. By systematically examining these components, DIYers can identify and potentially resolve the issues affecting their cruise control system.

How urgent is it to address the malfunctioning cruise control in a 2020 Mercedes-Benz S560?

When it comes to a malfunctioning cruise control system in a 2020 Mercedes-Benz S560, the urgency of addressing the issue cannot be overstated. A faulty cruise control can lead to unpredictable vehicle behavior, such as sudden acceleration or deceleration, which significantly increases the risk of accidents on the road. This safety concern is compounded by the fact that neglecting the problem may not only endanger the driver and passengers but also other road users. Furthermore, delaying repairs can exacerbate the issue, potentially leading to more severe damage to the vehicle's components, which could result in costly repairs down the line. Therefore, it is crucial to consult with a certified mechanic or an authorized Mercedes-Benz service center as soon as symptoms arise. Taking prompt action ensures the safety and optimal performance of your vehicle, allowing you to enjoy the driving experience without the worry of malfunctioning systems.

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